Statistics Calculator

Paste a list of numbers and get count, sum, mean, median, mode, range, quartiles, IQR, variance, and standard deviation. Calculates in your browser.

Count-
Sum-
Mean-
Median-
Mode-
Range (min–max)-
Q1 · Q3 · IQR-
Std dev (sample)-
Variance (sample)-

Show the math

Descriptive statistics summarise a list of numbers:

mean = Σx ÷ n  ·  s = √(Σ(x − mean)² ÷ (n − 1))

Quartiles use Tukey's hinges; the sample standard deviation divides by n − 1. All math runs in your browser.

What this does

A statistics calculator takes a list of numbers and returns count, sum, mean, median, mode, range, quartiles, IQR, variance, and standard deviation.

How to use it

  1. Paste or type your numbers.
  2. Separate them with commas or spaces.
  3. Read the full summary.
  4. Copy the measures you need.

How it works

It reports sample statistics, dividing variance by n − 1, and uses Tukey’s hinges for quartiles.

mean = sum ÷ count; sample SD divides by n − 1

Understanding your result

Read the spread alongside the average, because the mean alone hides the story: a small standard deviation means the data clusters tightly, a large one means it scatters. The median resists outliers while the mean does not, so a big gap between them signals skew. These are sample statistics (dividing by n minus 1), the right choice when your data is a sample of something larger.

Example

For 2, 4, 4, 6 the mean is 4 and the sample SD is about 1.63.

Sources & methodology

Last updated .

Frequently asked questions

What summary measures are shown?

Count, sum, mean, median, mode, min/max range, quartiles (Q1, Q3, IQR), and sample variance and standard deviation.

Is this sample or population standard deviation?

It reports the sample statistics, dividing by n − 1. Quartiles use Tukey’s hinges.

Is my data stored?

No. Everything is calculated locally in your browser.